📖 From An Introduction To Microprocessor 8085 • 10. Programmable Keyboard and Display Interface: 8279 • 6 questions available
Practice MCQs for Display Modes of 8279. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.
🔄 Last updated: 2026-07-30
Q1. Which pin on the 8253 is designated as the Chip Select (CS) terminal?
💡 Difficulty: easy | ✅ Correct: A
Q2. A microcontroller needs to read the current count value from counter 2 of an 8253. Which combination of control signals (CS, RD, WR, A1, A0) should be asserted?
💡 Difficulty: medium | ✅ Correct: B
Q3. Why are the CS, RD, and WR inputs of the 8253 defined as active‑low signals in typical microprocessor interfacing?
💡 Difficulty: hard | ✅ Correct: B
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